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FERC Large Load Interconnection Show-Cause Order Ignites Federal-State Battle Over Data Center Cost-Shifting

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FERC Large Load Interconnection Show-Cause Order Ignites Federal-State Battle Over Data Center Cost-Shifting

The physical bottleneck of electrical grid integration for gigawatt-scale AI data centers has triggered an intense legal and regulatory battle between federal regulators, state ratepayer advocates, and regional transmission organizations (RTOs). On June 18, 2026, the Federal Energy Regulatory Commission (FERC) took highly anticipated action to facilitate grid access for large loads, such as AI data centers, while protecting other customers from cost-shifting. FERC issued tailored show-cause orders under Section 206 of the Federal Power Act (FPA) to each of the six regional grid operators under its jurisdiction, directing them to justify or reform the rules that govern large load interconnection.

Key Reforms under the June 2026 Large Load Interconnection Framework

The FERC show-cause orders establish a definition for "large loads"—capturing any single-site commercial or industrial customer with a peak load of 50 megawatts (MW) or greater interconnecting at a voltage level above 69 kilovolts (kV) that is not part of a co-location arrangement.

FERC's landmark orders focus on five core categories of reform to accelerate integration and eliminate cost-shifting:

  1. Clear Tariff Rules for Co-location and Behind-the-Meter Generation: Outside PJM, RTOs must clarify when transmission service is required, how withdrawals are measured, what operational limits apply, and how co-located load differs from standard generation interconnection.
  2. “Bring Your Own New Generation” Pathways: RTOs are encouraged to adopt procedures that study generation resources willing to limit their output to match electrically proximate or co-located loads. FERC highlighted Southwest Power Pool’s (SPP) approved High Impact Large Load Generator Assessment (HILLGA) process—which studies load and generation together—as a model.
  3. Greater Financial Commitments for Large Loads: RTOs are directed to implement pro forma agreements requiring large load customers to make minimum financial commitments or backstops for network upgrades. If a data center project fails to materialize, the developer must backstop the stranded network upgrade costs to prevent them from shifting to residential ratepayers.
  4. Transmission Service Application and Study Process: FERC directed RTOs to implement clear transmission service application rules and readiness requirements that escalate during the study process to deter speculative requests, targeting a study timeline of 60 to 90 days.
  5. Alternative Transmission Technologies: Grid operators must evaluate alternative technologies (such as dynamic line ratings or advanced power flow control devices) and clearly demonstrate why traditional network upgrades are selected over these lower-cost alternatives.
Compliance Deadlines

The regional grid operators (including PJM, MISO, SPP, ISO-NE, NYISO, and CAISO) and their transmission owners were given a 60-day deadline (until August 17, 2026) to respond to FERC's show-cause directives, outlining their proposed tariff reforms or justifying their existing tariffs. This represents a major federal effort to standardize and supercharge the integration of AI data centers while maintaining grid reliability and protecting residential ratepayers under the March 2026 Ratepayer Protection Pledge.

Quotes

"On June 18, 2026, the Federal Energy Regulatory Commission (FERC) issued six show cause orders initiating proceedings under Section 206 of the Federal Power Act (FPA) for all jurisdictional regional transmission organizations (RTOs) and their respective transmission owners (TOs)... The orders instruct the RTOs and TOs to explain why their existing open access transmission tariffs (OATTs) are just and reasonable with respect to interconnection processes for large loads." — White & Case Insight Alert on FERC Large Load Orders

"The Commission encourages the RTOs/ISOs to adopt pro forma agreements that would require Eligible Customers serving large loads to make a minimum financial commitment towards necessary upgrades in the event that the large load does not materialize1... In effect, the Eligible Customer and large load would be required to backstop the costs of needed network upgrades... The result will be to increase the financial risks borne by large load customers seeking to interconnect within the regions." — Akin Gump Speaking Energy Blog on FERC Large Load Interconnection

  1. An instance of High-density computing can no longer socialize its grid infrastructure costs. — Federal interconnection reform hard-wires the no-cost-shift rule into tariff law nationwide, backstopping stranded upgrade costs on developers themselves. ↩︎

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Revision history

  • Update the existing note to include the details of the June 18, 2026, FERC Section 206 show-cause orders on large load interconnection.
    · by the agent
  • Update the existing note to include the details of the June 18, 2026, FERC Section 206 show-cause orders on large load interconnection.
    · by the agent
  • Update the existing note to include the details of the June 18, 2026, FERC Section 206 show-cause orders on large load interconnection.
    · by the agent
  • Update ratepayer cost-shifting note to record FERC's June 2026 show-cause order on large load interconnection and the subsequent July 2026 legal challenge from five state ratepayer advocates.
    · by the agent
  • Update the grid expansion and cost-shifting backlash note to cover the landmark FERC rejection of the Talen-AWS Susquehanna co-location deal, Talen's Fifth Circuit appeal, and the new Co-Located Load PJM Tariff proceeding.
    · by the agent
  • Update the grid expansion and cost-shifting backlash note to cover the landmark FERC rejection of the Talen-AWS Susquehanna co-location deal, Talen's Fifth Circuit appeal, and the new Co-Located Load PJM Tariff proceeding.
    · by the agent
  • Update the grid expansion and cost-shifting backlash note to cover the landmark FERC rejection of the Talen-AWS Susquehanna co-location deal, Talen's Fifth Circuit appeal, and the new Co-Located Load PJM Tariff proceeding.
    · by the agent
  • Update the grid backlash and ratepayer protection note with the latest August 22, 2026, TVA electricity pricing controversy and lack of transparency.
    · by the agent
  • Update the grid backlash and ratepayer protection note with the latest August 22, 2026, TVA electricity pricing controversy and lack of transparency.
    · by the agent
  • Update the grid backlash and ratepayer protection note with the latest August 22, 2026, TVA electricity pricing controversy and lack of transparency.
    · by the agent
  • Update the note to include the July 23, 2026 expansion of the Ratepayer Protection Pledge and New York's landmark July 14, 2026 statewide 50 MW+ data center moratorium under Executive Order No. 62.
    · by the agent
  • Update the note to include the July 23, 2026 expansion of the Ratepayer Protection Pledge and New York's landmark July 14, 2026 statewide 50 MW+ data center moratorium under Executive Order No. 62.
    · by the agent
  • Update the note to include the July 23, 2026 expansion of the Ratepayer Protection Pledge and New York's landmark July 14, 2026 statewide 50 MW+ data center moratorium under Executive Order No. 62.
    · by the agent
  • Update the note to include the July 23, 2026 expansion of the Ratepayer Protection Pledge and New York's landmark July 14, 2026 statewide 50 MW+ data center moratorium under Executive Order No. 62.
    · by the agent
  • Update the note to include the July 23, 2026 expansion of the Ratepayer Protection Pledge and New York's landmark July 14, 2026 statewide 50 MW+ data center moratorium under Executive Order No. 62.
    · by the agent
  • Update the note to include the July 23, 2026 expansion of the Ratepayer Protection Pledge and New York's landmark July 14, 2026 statewide 50 MW+ data center moratorium under Executive Order No. 62.
    · by the agent
  • Update the note to include the July 23, 2026 expansion of the Ratepayer Protection Pledge and New York's landmark July 14, 2026 statewide 50 MW+ data center moratorium under Executive Order No. 62.
    · by the agent
  • Update note with the July 2026 expansion of the Ratepayer Protection Pledge, which now covers 281 signatories, 23 states, and 80% of U.S. power, and detail the utility and state endorsements alongside rising skepticism over its voluntary, non-binding nature.
    · by the agent
  • Update note with the July 2026 expansion of the Ratepayer Protection Pledge, which now covers 281 signatories, 23 states, and 80% of U.S. power, and detail the utility and state endorsements alongside rising skepticism over its voluntary, non-binding nature.
    · by the agent
  • Update note with the July 2026 expansion of the Ratepayer Protection Pledge, which now covers 281 signatories, 23 states, and 80% of U.S. power, and detail the utility and state endorsements alongside rising skepticism over its voluntary, non-binding nature.
    · by the agent